| 基于GNSS精密单点定位的高精度云平台授时 |
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| 引用本文： | 刘根友,高铭,尹翔飞,肖恭伟,吕栋,王生亮,王润.基于GNSS精密单点定位的高精度云平台授时[J].测绘学报,2022,51(8):1736-1743. |
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| 作者姓名： | 刘根友 高铭 尹翔飞 肖恭伟 吕栋 王生亮 王润 |
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| 作者单位： | 1. 中国科学院精密测量科学与技术创新研究院大地测量与地球动力学国家重点实验室, 武汉 430077;2. 中国科学院大学地球与行星科学学院, 北京 100049 |
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| 基金项目： | 国家重点研发计划(2016YFB0501900);国家自然科学基金(41774017) |
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| 摘 要： | 采用GNSS精密单点定位(PPP)技术和时钟驯服技术,构建了基于PPP的云平台高精度授时方案,研制了搭载多系统GNSS接收机板卡、恒温晶振(OCXO)和数字信号处理器(DSP)的授时原理样机。利用协同精密定位平台分析中心(武汉)提供的5 s间隔卫星轨道和钟差产品,采用PPP技术实时解算授时终端坐标和钟差,通过驯服恒温晶振输出亚纳秒精度的1 PPS,实现了长时间高精度的授时能力。本文通过短基线比较和与UTC绝对时间基准比较,验证了精密单点授时精度(RMS)优于1 ns。
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| 关 键 词： | 精密单点定位 高精度授时 时钟驯服 时间同步 |
| 收稿时间： | 2021-08-09 |
| 修稿时间： | 2022-06-29 |
High-precision cloud platform timing based on GNSS precise point positioning |
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| LIU Genyou,GAO Ming,YIN Xiangfei,XIAO Gongwei,L&#,Dong,WANG Shengliang,WANG Run.High-precision cloud platform timing based on GNSS precise point positioning[J].Acta Geodaetica et Cartographica Sinica,2022,51(8):1736-1743. |
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| Authors: | LIU Genyou GAO Ming YIN Xiangfei XIAO Gongwei L&# Dong WANG Shengliang WANG Run |
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| Institution: | 1. State Key Laboratory of Geodesy and Earth's Dynamics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430077, China;2. College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | In this paper,based on GNSS precise point positioning (PPP) technology and clock steering technology,a cloud computing platform high-precision GNSS timing system is constructed,and the GNSS timing receiver prototype is developed with integrating multi-system GNSS receiver board,oven controlled crystal oscillator (OCXO) and digital signal processors (DSP).Using the 5 s interval satellite orbit and precise clock products provided by the Cooperative Precision Positioning Platform Analysis Center (Wuhan),PPP is used to calculate the coordinates and clock offset of the GNSS timing terminal in real time,and the OCXO can be steered to achieve long-term high-precision timing capability for sub-ns precision 1 PPS output.Experiments verify that the PPP timing accuracy is better than 1 ns (RMS) through the comparison between two GNSS timing terminals among short baseline and the comparison between UTC and the terminal time output. |
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